700r4 tail change
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4th Gear
Joined: Jan 2018
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700r4 tail change
My friend got a 700r4 transmission from Bowtie with a 1969 corvette tail. I am interested in buying it.If i change the tail and speedo gear to mine that is a 1984 i can work? Or have to modify the output shaft?
Team Owner
Joined: Sep 2003
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Only measuring would confirm but so long as it's a 700R4 I'd think you would be fine. Is it a 700R4 with the AUX Valve body or just what? The cut-off of the shaft isn't an issue. It's generally assumed the the 700R4 output has both locations for the drive gear mounting.
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4th Gear
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It’s not with the AUX valve body.
Le Mans Master
Joined: Feb 2005
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From: Clearwater Florida
..... A 69 Corvette should have had a TH400 ... if what you have is truly a 700R4 it's most likely from a car or truck with the crossmember mount tail housing on it ... the output shaft probably needs to be cut a bit shorter ... as I recall , the difference is 5/8ths of an inch ... but before you cut anything , you need to know what you have ... the TH400 has a vacuum modulator on the passenger side near the dipstick tube ... TH350 vacuum modulator is on the back of the case ... 700R4 does not have a vacuum can but does have a TV cable next to the dipstick and a square electrical connector on the drivers side about mid way facing straight up ... external I.D. of the aux valve body 700R4 is a casting mark on the pass side of the trans shaped like the side view of a cam lobe that encircles the oil cooler line fittings and the servo .....
Last edited by C409; Jan 18, 2018 at 08:18 AM.
Thread Starter
4th Gear
Joined: Jan 2018
Posts: 4
Likes: 0
..... A 69 Corvette should have had a TH400 ... if what you have is truly a 700R4 it's most likely from a car or truck with the crossmember mount tail housing on it ... the output shaft probably needs to be cut a bit shorter ... as I recall , the difference is 5/8ths of an inch ... but before you cut anything , you need to know what you have ... the TH400 has a vacuum modulator on the passenger side near the dipstick tube ... TH350 vacuum modulator is on the back of the case ... 700R4 does not have a vacuum can but does have a TV cable next to the dipstick and a square electrical connector on the drivers side about mid way facing straight up ... external I.D. of the aux valve body 700R4 is a casting mark on the pass side of the trans shaped like the side view of a cam lobe that encircles the oil cooler line fittings and the servo .....
It’s a 1986 700r4 with a C3 tail....
